InterviewSolution
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InterviewSolution
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Copper of fixed volume `V` is drawn into wire of length l. When this wire is subjected to a constant force F, the extension produced in the wire is `trianglel`. Which of the following graphs is a straight line?A. `Delta l` versus `1//l`B. `Delta l` versus `l^(2)`C. `Delta l` versus `1//l^(2)`D. `Delta l` versus `l` |
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Answer» Correct Answer - B Volume `V=Al` or `A=V//l` `Y=(Fl)/(A Delta l)=(F l)/((V/l)Delta l)=(Fl^(2))/(V Delta l)` `Delta l=(F l^(2))/(Vy)` , So `Delta l prop l^(2)` |
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